Joining Records With Nearest Datetimes

Mar 19, 2013

How would I match datetimes in records structured as follows:

Code:
Record1 AccountNo StartDateTime EndDateTime
1 1234 4/30/2012 8:00 AM NULL

2 1234 NULL 5/15/2012 8:00 AM

Desired Result:

Code:
AccountNo StartDateTime EndDateTime
1234 4/30/2012 8:00 AM 5/15/2012 8:00 AM

Of course there are multiple accounts, about 2100 in this case but they very by time periods, and multiple start and stop dates for an account. I need to get the start times and match them w/ the nearest end times but AFTER the value of the start time. Nearest end times must be forced to correspond to the nearest start time but there are some start times w/o end times and end times w/o start times due to user data entry errors. I need a solution that handles this. It is ok w/ the customer to make the assumption of nearest times supposedly going together so they can show the users the errors. I am on SQL Server 2008 R2.

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Hi,

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